. >> i feel great, a lot of energy. it's been a wonderful experience. >> reporter: she takes a prenatal multivitamin with folic acid. a study looked at 85,000 children in norway. researchers found mothers who took folic acid supplements before they conceived and during the first two months of their pregnancy lowered their chances of having a child with autism 39%. >> it will lead to new ideas and potentially new ways to prevent autistic disorders. >> reporter: folic acid is already known to reduce the risk of brain and spine birth defects, like spina bifida. >> it's not in any way dangerous to the patient. it is not costly. it's part of the standard of care regardless. we would definitely recommend it. >> reporter: doctors recommend that women who are pregnant or becoming -- or planning to become pregnant take 400 micrograms of folic acid a day. it's found in foods, including leafy vegetables, citrus fruits and whole grains but most women don't get enough through food alone. danetia has been taking supplements since try